C++虚表地址、虚函数地址打印

#include <iostream>
using namespace std;

class Base
{
public :
    int base_data;
    Base() { base_data = 1; }
    virtual void func1() { cout << "base_func1" << endl; }
    virtual void func2() { cout << "base_func2" << endl; }
    virtual void func3() { cout << "base_func3" << endl; }
};

class Derive : public Base
{
public :
    int derive_data;
    Derive() { derive_data = 2; }
    virtual void func1() { cout << "derive_func1" << endl; }
    virtual void func2() { cout << "derive_func2" << endl; }
};

typedef void (*func)();

int test()
{
    Base base;
    cout << "&base: " << &base << endl;
    cout << "&base.base_data: " << &base.base_data << endl;
    cout << "----------------------------------------" << endl;

    Derive derive;
    cout << "&a